Original practice · fully worked
Original variant: present value of a deferred arithmetic grant stream
A five-payment grant begins with 600 at year 3, and each later annual payment is 200 larger. At a 5% annual effective yield, calculate the present value at time 0.
- A
3,657.88 - B
3,850.40 - C
4,042.92 - D
4,235.44 - E
4,427.96
Answer and calculation
Discounting the five payments 600 through 1,400 from years 3 through 7 gives present value 3,850.40, choice B.
Setup
Setup
Generate the five payment amounts and their dates.
Pk=600+200k,tk=3+k,k=0,…,4 Model
Model
Discount every payment directly to time 0 at 5%.
PV=k=0∑4(600+200k)(1.05)−(3+k) Compute
Compute
The five-term discounted sum is 3850.403044.
PV=3850.40304357 Answer
Answer
The grant's present value is 3,850.40, selecting choice B.
PV≈3850.40(B)